#173540#173540

#173540 is a dark, muted cyan. Relative luminance 0.031; OKLCH L 31.1% C 0.041 H 224.5°. Best body text is #FFFFFF at 12.96:1 contrast (WCAG AA passes).

Color values

HEX	#173540
RGB	rgb(23, 53, 64)
HSL	hsl(196, 47%, 17%)
HSV	hsv(196, 64%, 25%)
CMYK	cmyk(64.1%, 17.2%, 0%, 74.9%)
CIE-LAB	lab(20.43, -7.33, -10.27)
CIE-LCH	lch(20.43, 12.62, 234.48°)
OKLab	oklab(31.11% -0.0291 -0.0285)
OKLCH	oklch(31.11% 0.041 224.5)
XYZ	xyz(2.5515, 3.0983, 5.3131)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173540 #402217

analogous

#174037 #173540 #172140

triadic

#173540 #401735 #354017

tetradic

#173540 #371740 #402217 #214017

square

#173540 #371740 #402217 #214017

split-complementary

#173540 #401721 #403717

monochromatic

#081317 #081317 #173540 #275A6D #37809A

Accessibility & contrast

On white

12.96

#173540 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#173540 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173540

12.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173540	#FFFFFF	#000000	##FFFFFF
##173540	1.00	12.96	1.62	12.96
#FFFFFF	12.96	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3441

Deuteranopia (green-blind)

#292F40

Tritanopia (blue-blind)

#003839

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #173540;
/* rgb */ color: rgb(23, 53, 64);
/* oklch */ color: oklch(31.1% 0.041 224.5);

Tailwind

colors: {
  custom: {
    50: '#586c74',
    500: '#173540',
    950: '#000000',
  },
}

SCSS

$custom: #173540;
$custom-light: #586c74;
$custom-dark: #000000;

JSON

{
  "hex": "#173540",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 64
  },
  "hsl": {
    "h": 196.098,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.31111,
    "c": 0.04075,
    "h": 224.5
  },
  "luminance": 0.03099
}

Semantic roles & 50–950 ramp

primary

#173540

secondary

#774C3C

accent

#7551D7

background

#F5F6F7

surface

#E9EBED

border

#C5C6C8

text

#030608

muted

#787A7B

Preview Lab

Preview with #173540

Body copy rendered with the generated semantic roles for this colour.

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